Controlling the formation of ionic-liquid-based aqueous biphasic systems by changing the hydrogen-bonding ability of polyethylene glycol end groups

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dc.contributor.authorPereira, Jorge F. B. [UNESP]
dc.contributor.authorKurnia, Kiki A.
dc.contributor.authorFreire, Mara G.
dc.contributor.authorCoutinho, João A. P.
dc.contributor.authorRogers, Robin D.
dc.contributor.institutionUniversity of Alabama
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Aveiro
dc.contributor.institutionMcGill University
dc.date.accessioned2015-12-07T15:33:46Z
dc.date.available2015-12-07T15:33:46Z
dc.date.issued2015
dc.description.abstractThe formation of aqueous biphasic systems (ABS) when mixing aqueous solutions of polyethylene glycol (PEG) and an ionic liquid (IL) can be controlled by modifying the hydrogen-bond-donating/-accepting ability of the polymer end groups. It is shown that the miscibility/immiscibility in these systems stems from both the solvation of the ether groups in the oxygen chain and the ability of the PEG terminal groups to preferably hydrogen bond with water or the anion of the salt. The removal of even one hydrogen bond in PEG can noticeably affect the phase behavior, especially in the region of the phase diagram in which all the ethylene oxide (EO) units of the polymeric chain are completely solvated. In this region, removing or weakening the hydrogen-bond-donating ability of PEG results in greater immiscibility, and thus, in a higher ability to form ABS, as a result of the much weaker interactions between the IL anion and the PEG end groups.en
dc.description.affiliationDepartment of Chemistry, The University of Alabama, Tuscaloosa, AL, USA
dc.description.affiliationDepartamento de Bioprocesso e Biotecnologia, Faculdade de Ciências Farmacêuticas (FCFAR), Universidade Estadual Paulista (UNESP), Araraquara, SP, Brasil
dc.description.affiliationChemistry Department, CICECO, University of Aveiro, Aveiro, Portugal
dc.description.affiliationChemistry Department, McGill University, Montreal, QC, Canada
dc.description.affiliationUnespDepartamento de Bioprocesso e Biotecnologia, Faculdade de Ciências Farmacêuticas (FCFAR), Universidade Estadual Paulista (UNESP), Araraquara, SP, Brasil
dc.description.sponsorshipCCM
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipERC
dc.description.sponsorshipIdCCM: 2014/16424-7
dc.description.sponsorshipIdERC: ERC-2013-StG-337753
dc.format.extent2219-2225
dc.identifierhttp://dx.doi.org/10.1002/cphc.201500146
dc.identifier.citationChemphyschem, v. 16, n. 10, p. 2219-2225, 2015.
dc.identifier.doi10.1002/cphc.201500146
dc.identifier.issn1439-7641
dc.identifier.pubmed25943332
dc.identifier.urihttp://hdl.handle.net/11449/131314
dc.language.isoeng
dc.publisherWiley-VCH Verlag GmbH & Co. KGaA, Weinheim
dc.relation.ispartofChemphyschem
dc.relation.ispartofsjr1,280
dc.rights.accessRightsAcesso restrito
dc.sourcePubMed
dc.subjectAqueous biphasic systemsen
dc.subjectHydrogen bondingen
dc.subjectIonic liquidsen
dc.subjectPolyethylene glycolen
dc.subjectPolymersen
dc.titleControlling the formation of ionic-liquid-based aqueous biphasic systems by changing the hydrogen-bonding ability of polyethylene glycol end groupsen
dc.typeArtigo
dcterms.rightsHolderWiley-VCH Verlag GmbH & Co. KGaA, Weinheim
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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